mirror of
https://gitlab.freedesktop.org/gstreamer/gstreamer.git
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202 lines
4.8 KiB
C
202 lines
4.8 KiB
C
/*
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* Copyright (C) 2014 Collabora Ltd.
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* Author: Nicolas Dufresne <nicolas.dufresne@collabora.co.uk>
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*
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* This library is free software; you can redistribute it and/or
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* modify it under the terms of the GNU Library General Public
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* License as published by the Free Software Foundation; either
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* version 2 of the License, or (at your option) any later version.
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*
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* This library is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* Library General Public License for more details.
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*
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* You should have received a copy of the GNU Library General Public
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* License along with this library; if not, write to the
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* Free Software Foundation, Inc., 51 Franklin St, Fifth Floor,
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* Boston, MA 02110-1301, USA.
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*
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*/
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#ifdef HAVE_CONFIG_H
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#include "config.h"
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#endif
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#include "v4l2-utils.h"
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/**************************/
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/* Common device iterator */
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/**************************/
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#ifdef HAVE_GUDEV
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#include <gudev/gudev.h>
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struct _GstV4l2GUdevIterator
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{
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GstV4l2Iterator parent;
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GList *devices;
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GUdevDevice *device;
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GUdevClient *client;
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};
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GstV4l2Iterator *
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gst_v4l2_iterator_new (void)
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{
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static const gchar *subsystems[] = { "video4linux", NULL };
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struct _GstV4l2GUdevIterator *it;
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it = g_slice_new0 (struct _GstV4l2GUdevIterator);
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it->client = g_udev_client_new (subsystems);
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it->devices = g_udev_client_query_by_subsystem (it->client, "video4linux");
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return (GstV4l2Iterator *) it;
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}
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gboolean
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gst_v4l2_iterator_next (GstV4l2Iterator * _it)
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{
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struct _GstV4l2GUdevIterator *it = (struct _GstV4l2GUdevIterator *) _it;
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const gchar *device_name;
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if (it->device)
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g_object_unref (it->device);
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it->device = NULL;
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it->parent.device_path = NULL;
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it->parent.device_name = NULL;
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if (it->devices == NULL)
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return FALSE;
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it->device = it->devices->data;
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it->devices = g_list_delete_link (it->devices, it->devices);
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device_name = g_udev_device_get_property (it->device, "ID_V4L_PRODUCT");
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if (!device_name)
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device_name = g_udev_device_get_property (it->device, "ID_MODEL_ENC");
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if (!device_name)
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device_name = g_udev_device_get_property (it->device, "ID_MODEL");
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it->parent.device_path = g_udev_device_get_device_file (it->device);
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it->parent.device_name = device_name;
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it->parent.sys_path = g_udev_device_get_sysfs_path (it->device);
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return TRUE;
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}
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void
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gst_v4l2_iterator_free (GstV4l2Iterator * _it)
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{
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struct _GstV4l2GUdevIterator *it = (struct _GstV4l2GUdevIterator *) _it;
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g_list_free_full (it->devices, g_object_unref);
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gst_object_unref (it->client);
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g_slice_free (struct _GstV4l2GUdevIterator, it);
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}
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#else /* No GUDEV */
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struct _GstV4l2FsIterator
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{
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GstV4l2Iterator parent;
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gint base_idx;
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gint video_idx;
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gchar *device;
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};
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GstV4l2Iterator *
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gst_v4l2_iterator_new (void)
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{
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struct _GstV4l2FsIterator *it;
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it = g_slice_new0 (struct _GstV4l2FsIterator);
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it->base_idx = 0;
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it->video_idx = -1;
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it->device = NULL;
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return (GstV4l2Iterator *) it;
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}
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gboolean
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gst_v4l2_iterator_next (GstV4l2Iterator * _it)
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{
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struct _GstV4l2FsIterator *it = (struct _GstV4l2FsIterator *) _it;
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static const gchar *dev_base[] = { "/dev/video", "/dev/v4l2/video", NULL };
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gchar *device = NULL;
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g_free ((gchar *) it->parent.device_path);
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it->parent.device_path = NULL;
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while (device == NULL) {
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it->video_idx++;
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if (it->video_idx >= 64) {
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it->video_idx = 0;
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it->base_idx++;
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}
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if (dev_base[it->base_idx] == NULL) {
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it->video_idx = 0;
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break;
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}
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device = g_strdup_printf ("%s%d", dev_base[it->base_idx], it->video_idx);
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if (g_file_test (device, G_FILE_TEST_EXISTS)) {
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it->parent.device_path = device;
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break;
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}
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g_free (device);
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device = NULL;
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}
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return it->parent.device_path != NULL;
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}
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void
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gst_v4l2_iterator_free (GstV4l2Iterator * _it)
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{
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struct _GstV4l2FsIterator *it = (struct _GstV4l2FsIterator *) _it;
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g_free ((gchar *) it->parent.device_path);
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g_slice_free (struct _GstV4l2FsIterator, it);
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}
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#endif
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void
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gst_v4l2_clear_error (GstV4l2Error * v4l2err)
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{
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if (v4l2err) {
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g_clear_error (&v4l2err->error);
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g_free (v4l2err->dbg_message);
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v4l2err->dbg_message = NULL;
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}
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}
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void
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gst_v4l2_error (gpointer element, GstV4l2Error * v4l2err)
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{
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GError *error;
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if (!v4l2err || !v4l2err->error)
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return;
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error = v4l2err->error;
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if (error->message)
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GST_WARNING_OBJECT (element, "error: %s", error->message);
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if (v4l2err->dbg_message)
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GST_WARNING_OBJECT (element, "error: %s", v4l2err->dbg_message);
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gst_element_message_full (GST_ELEMENT (element), GST_MESSAGE_ERROR,
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error->domain, error->code, error->message, v4l2err->dbg_message,
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v4l2err->file, v4l2err->func, v4l2err->line);
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error->message = NULL;
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v4l2err->dbg_message = NULL;
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gst_v4l2_clear_error (v4l2err);
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}
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